Elevator-door lock



Oct. 21, 1930-1, o. J. KLEVEN ELEVATOR DOOR LOCK Filed June 16, 1928 is secured to the Patented Oct. 21, 1930 GUSTAV o. .1. KLEVE or slur-LA E or, UTAH ELEVATOR-DOOR LOCK Application filed June 16,

My invention relates to elevator door locks and has for its object to provide a new and eflicient door lock which will control the current to the elevator so that the elevator can not be operated without the door of the shaft being completely closed.

A. further object is to provide an elevator door lock which will be positive in its action and which will not allow the operator to open the door except when he is even with the floor of the door.

A still further'object is to provide a door lock which will be controlled by a cam on the. elevator frame and which will be positive in its action so that the door can not be opened at any time except when the elevator is even with the floor of the door and the elevator can not be moved while the door is open or partially open but only when the door is completely closed and the contact made through the door lock.

These objects I accomplish with the device illustrated in the accompanying drawings, in which similar numerals andletters of reference indicate like parts throughout the several views and as described in the specification forming a part of this application and pointed out in theappended claims.

In the drawings, in which I have shown the best and mostpreferred manner of building my invention, Figure elevator door lock with the front plate'removed therefrom and with the portion which door shown in elevation.

Figure 2 is a section on line 2-2 of Figure 1.

Figure 3 is a rear view of the weight used in the lock. Figure 4 is a side elevation of the same.

In the drawings I have shown the casing in which my lock is mounted as A, with the engaging dogof the usual type shown as B. On the bottom side of the casing a contact member C is mounted, to which the lead wires 1 and 2 are secured, with each wire 1 and 2 being secured to the end of two spaced apart contact plates 3 and 4. The lead wires'l and 2 and the contact plates 3 and 4 are to complete the operating circuit of the elevator and without the use thereof the entire device would not be operative. The engaging dog B has its front thereof rests upon the 1 is a front view of the 192s. SerialNo. 255,999.

face provided with connection plate 5, which plate 5, when brought into contact with the contact plates 3 and 4:, forms a connection therebetween and the current will travel therethrough. When the plate 5 is brought into contact with the contact plates 3 and 4 the circuit of the elevator is completed and the operator may then move the elevator from floor to floor but when theyarenot engaging the circuit cannot be completed and the elevator will not operate. The said connection plate5 is insulated from the engaging dog B by an insulation block 5 secured in the face of the dog B. -A sliding locking block Dis carried above the dog B and'the lower face upper faceof the dog B at all times sothat the weight of the block Dis upon the dog B to make apositive contact between the plate 5 and the plates 3 and 4.

The said weight-or, lockingblock D is'provided with-a guide rod E which operates in an opening F cut out in the topof the block D'and keeps it in position at all times. I then provide a set of levers consisting of a locking bar 6 on a lever 7, which lever 7 is secured to a shaft 8 through a bearingblock 9 and out through the side of the casing A. Another operating lever 10' is secured on the outer free end of the shaft 8 and a weight and roller 11' are carried on a stub shaft 12' secured on the-free end of the lever'lO. The locking block D-is provided with a milled cut 13 along a portion 'of one sideand a small portion is removed from the top end o-f-the said blockyforming a cut 14, one'side 1570f which is sloping slightly towardthe cut for operating thelock 13. When the lockingbar 6 is-moved forward over the top of the block D it operates in the cut 14 over the side 15 until it reaches dead center over the top of the block, thereby locking the block until such time as it is again moved backwardly into the cut 13. When the bar 6 is in the cut 13 the block D may then be raised by operating the dog B in the usual manner of withdrawing the handle H. The sloping cut 14 is made so that the bar 6 will pass over the upper edge of the block D without any binding thereon.

The operation of my device is as follows:

cam (not shown) which, when passing a floor, actuates the set of operating levers which consists of engaging the roller 11 forcing the lever 10 backward, thereby moving the lever 7 backwardly, placing the bar 6 above the slot or cut 13, enabling the operator to open the door, and when the cam passes the roller 11 the weight thereof being hung slightly off center will draw the lever 10 forward, placing the bar 6 at dead center over the top oi? the block I) and in which position the door is locked closed.

Having thus described my invention I desire to secure by Letters Patent and claims 1. In an elevator door lock the combination of a weight block bearing upon the locking dog of the door lock; a set of levers having a roller on one end and a bar on the other, with the movement of the levers adapted to place the bar over the top of the block to lock it in closed position and to be moved off from the top by the movement of the levers to allow the locking dog to be removed from the lock.

2. In an elevator door lock the combination of a casing; an electrical Contact switch secured therein adapted to allow current to flow therethrough when the dog of the elevator door is in contact therewith; a set of levers secured to a shaft carried in said casing, with one of said levers adapted to be actuated by the movement oi the elevator to actuate the other lever within the casing; a weightcarried within said casing bearing upon the dog of the elevator door, having a milled cut therein in which a bar secured to the end of the last mentioned lever may be operated to lock or release the block as the levers are actuated.

3. In an elevator door lock the combination of a casing; a weight block carried therein adapted to bear upon the locking dog of the door lock; a set of levers being mounted on a shaft passed through one side of said casing; a roller on one end of said levers and a bar on the other end; and a slot out along one side of said weightblock in which said bar may operate when the lock is being opened.

In testimony signature.

GUSTAV O. J. KLEVEN.

whereof I have affixed my 

